Tilman Hausherr created PDFBOX-3524:
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Summary: signatureField.setValue() not implemented
Key: PDFBOX-3524
URL: https://issues.apache.org/jira/browse/PDFBOX-3524
Project: PDFBox
Issue Type: Sub-task
Components: Signing
Affects Versions: 2.0.3
Reporter: Tilman Hausherr
In the CreateEmptySignatureForm example, adding
{code}
signatureField.setValue(new PDSignature());
{code}
before saving brings this
{code}
Exception in thread "main" java.lang.UnsupportedOperationException: not
implemented
at
org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField.constructAppearances(PDSignatureField.java:237)
at
org.apache.pdfbox.pdmodel.interactive.form.PDTerminalField.applyChange(PDTerminalField.java:226)
at
org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField.setValue(PDSignatureField.java:121)
at
org.apache.pdfbox.examples.signature.CreateEmptySignatureForm.main(CreateEmptySignatureForm.java:84)
{code}
What does work is this:
{code}
signatureField.getCOSObject().setItem(COSName.V, new PDSignature());
{code}
I wanted to add this line because this would make it possible to sign this
specific field with PDFBox, due to the findSignatureField() method in
PDDocument, which would allow to pre-fill a PDSignature object.
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